1、Designation:C567/C567M14Standard Test Method forDetermining Density of Structural Lightweight Concrete1This standard is issued under the fixed designation C567/C567M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last re
2、vision.A number in parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1 This test method provides procedures to det
3、ermine theoven-dry and equilibrium densities of structural lightweightconcrete.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the ot
4、her.Combiningvalues from the two systems may result in non-conformancewith the standard.Some values have only SI units because theinch-pound equivalents are not used in practice.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibi
5、lity of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2C31/C31M Practice for Making and Curing Concrete TestSpecimens in the FieldC88 Test Method for Sou
6、ndness of Aggregates by Use ofSodium Sulfate or Magnesium SulfateC125 Terminology Relating to Concrete and Concrete Ag-gregatesC138/C138M Test Method for Density(Unit Weight),Yield,and Air Content(Gravimetric)of ConcreteC172 Practice for Sampling Freshly Mixed ConcreteC192/C192M Practice for Making
7、and Curing Concrete TestSpecimens in the LaboratoryC470/C470M Specification for Molds for Forming ConcreteTest Cylinders VerticallyC670 Practice for Preparing Precision and Bias Statementsfor Test Methods for Construction MaterialsE104 Practice for Maintaining Constant Relative Humidityby Means of A
8、queous Solutions3.Terminology3.1 Terminology used in this test method is defined inTerminology C125.3.2 Definitions of Terms Specific to This Standard:3.2.1 equilibrium density,nthe density as determined in8.2 reached by structural lightweight concrete after exposure torelative humidity of 50 6 5%an
9、d a temperature of 23 6 2 C73.5 6 3.5 F for a period of time sufficient to reach constantmass.3.2.2 oven-dry densitythe density as determined in 8.3reached by structural lightweight concrete after being placed ina drying oven at 110 6 5 C 230 6 9 F for a period of timesufficient to reach constant ma
10、ss.4.Summary of Test Method4.1 This test method provides procedures for determiningthe oven-dry and equilibrium densities of structural lightweightconcrete,by calculation or measurement.The calculated oven-dry density is determined from batch quantities and volume ofa given batch of concrete.The cal
11、culated equilibrium density isapproximated by adding a fixed quantity to the oven-drydensity.Measured densities are obtained from determinationsof the mass of cylindrical specimens after specified treatments.5.Significance and Use5.1 The measured or calculated equilibrium density ofstructural lightw
12、eight concrete determines whether specifieddensity requirements have been met.Unless otherwisespecified,determine equilibrium density by calculation usingthe procedures in 9.2.5.2 Test Method C138/C138M shall be used to determinethe density of freshly mixed lightweight concrete for compli-ance with
13、concrete placement specifications.NOTE1The fresh density of lightweight aggregate concrete is afunction of mixture proportions,air content,water demand,and thespecific density and moisture content of the lightweight aggregate.Decrease in density of a specific lightweight concrete is due to moisture1
14、This test method is under the jurisdiction of ASTM Committee C09 onConcrete and Concrete Aggregatesand is the direct responsibility of SubcommitteeC09.21 on Lightweight Aggregates and Concrete.Current edition approved April 1,2014.Published May 2014.Originallyapproved in 1965.Last previous edition a
15、pproved in 2011 as C56711.DOI:10.1520/C0567_C0567M-14.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.*A Summary o
16、f Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 loss that,in turn,is a function of aggregate moisture content,ambientconditions,and the ratio of the surface area to the volume of the concretemember.For most structural lightweight concretes,equilibrium density isapproached at about 90 days.For most high-strength lightweightconcretes,equilibrium density is approached at about 180 days
